Fixed zero lineno issue for pdb

Author: gaogaotiantian

Lib/pdb.py

@@ -1352,6 +1352,9 @@ def do_longlist(self, arg):
         breaklist = self.get_file_breaks(filename)
         try:
             lines, lineno = inspect.getsourcelines(self.curframe)
+            # inspect.getsourcelines() returns 0 for module-level frame
+            # and it does not make sense for the code display
+            lineno = max(1, lineno)
         except OSError as err:
             self.error(err)
             return
@@ -1368,6 +1371,9 @@ def do_source(self, arg):
             return
         try:
             lines, lineno = inspect.getsourcelines(obj)
+            # inspect.getsourcelines() returns 0 for module-level frame
+            # and it does not make sense for the code display
+            lineno = max(1, lineno)
         except (OSError, TypeError) as err:
             self.error(err)
             return

Lib/test/test_pdb.py

@@ -1675,6 +1675,31 @@ def test_pdb_issue_gh_101673():
     (Pdb) continue
     """
 
+def test_pdb_issue_gh_103225():
+    """See GH-103225
+
+    Make sure longlist uses 1-based line numbers in frames that correspond to a module
+
+    >>> with PdbTestInput([  # doctest: +NORMALIZE_WHITESPACE
+    ...     'longlist',
+    ...     'continue'
+    ... ]):
+    ...     a = 1
+    ...     import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
+    ...     b = 2
+    > <doctest test.test_pdb.test_pdb_issue_gh_103225[0]>(7)<module>()
+    -> b = 2
+    (Pdb) longlist
+      1     with PdbTestInput([  # doctest: +NORMALIZE_WHITESPACE
+      2         'longlist',
+      3         'continue'
+      4     ]):
+      5         a = 1
+      6         import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
+      7  ->     b = 2
+    (Pdb) continue
+    """
+
 
 @support.requires_subprocess()
 class PdbTestCase(unittest.TestCase):